Security software maker Zone Labs updated its desktop firewall on Monday, adding new features that aim to put the kibosh on viruses, the company said.

The antivirus features will be offered in a commercial version of its basic free product, Zone Alarm, and as part of a comprehensive security suite, said Fred Felman, vice president of marketing of Zone Labs, an independent division of security technology company Check Point Software Technologies.

"Many consumers and small business users have asked for a more complete security solution, including antivirus, as well as a great firewall," Felman said. Zone Labs has licensed the antivirus technology from technology service provider Computer Associates International, which typically sells its product, eTrust Antivirus, to small and medium-size businesses. The new additions to its product lines puts Zone Labs in direct competition with the two top players in the home PC security market: Symantec's Norton Internet Security and Network Associates' McAfee Internet Security Suite.